0db871cc-8c30-4742-9340-f34a7f76c6f0 English series series 2026-02-13T15:17:07 MEDIN 3.1.2 geoscientificInformation oceans Sedimentary structure SeaDataNet Parameter Discovery Vocabulary 2023-12-12 revision Side-scan sonar SeaDataNet Parameter Discovery Vocabulary 2023-12-12 revision Bathymetry and Elevation SeaDataNet Parameter Discovery Vocabulary 2023-12-12 revision Post-Construction monitoring The Crown Estate Renewable Energy Development Phases 2012-05-15 revision Renewable Energy Lease area The Crown Estate Renewable Energy Development Areas 2012-05-15 revision Elevation GEMET - INSPIRE themes, version 1.0 2009-07-31 revision SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision bathybenthic 2019-04-16T00:00:00 2019-04-30T23:59:59 -1.53 -1.27 55.1 55.24 TCE-121 Marine Data Exchange 2019, Bibby HydroMap, Blyth Demonstration Site, Operations and Maintenance Geophysical Surveys Operations and Maintenance Geophysical Surveys 2021-11-10T16:32:18 publication English Bibby HydroMap were commissioned by Blyth Offshore Demonstrator Ltd/EDF Renewables, in August 2018, to undertake two geophysical surveys (in August-September 2018 and April 2019) at the Blyth Offshore Demonstrator wind farm, located off the north-east coast of the UK at Blyth, Northumberland. The 2019 survey was undertaken between 16th and 30th April 2019. This survey, comprising the collection of multibeam bathymetry and side scan sonar data, marks the first of a 3-year monitoring program, which will be undertaken at 6 monthly intervals, and after any major storm events. The objectives of the survey program are to acquire survey data to a resolution that will: - Identify seabed debris within the construction area; - Identify changes to seabed morphology, to enable the evaluation of the effectiveness of installed scour protection and ratify predictions for scour development; - Inform the foundation and cable maintenance schedule; and - Satisfy the requirements of the Marine Licence. http://www.marinedataexchange.co.uk/pages/terms-of-use.aspx otherRestrictions http://www.marinedataexchange.co.uk/pages/terms-of-use.aspx otherRestrictions The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk custodian Bibby HydroMap +44 1513 281 120 enquiries@bibbyhydromap.com originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk owner notPlanned Delimited Geographic Information System Text or Plaintext https://www.marinedataexchange.co.uk/details/TCE-121/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site. Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08T00:00:00 publication Conformity with the Commission Regulation (EU) No 1089/2010 was either not relevant to this dataset or not a requirement of the Marine Data Exchange for the creation and submission of this dataset; therefore, conformity has not been assessed and cannot be declared False Bathymetry 2025-11-27 revision This series has been Quality Assured so that it is compliant with the aforementioned MEDIN Guidelines and thus contains the mandatory components. In some instances, this compliance will not be feasible. True Hydrographic sidescan sonar 2025-11-27 revision This series has been Quality Assured so that it is compliant with the aforementioned MEDIN Guidelines and thus contains the mandatory components. In some instances, this compliance will not be feasible. True series A RESON T20-P dual head multibeam echo sounder was used to collect bathymetry data within the survey area. Within the transducer mounting a Sound Velocity (SV) sensor was fitted to provide realtime SV values. The system was interfaced with the Applanix PosMV system to provide timing and motion data to the collected bathymetry data. The MBES and peripheral sensors were interfaced to QPS QINSy, which stored and visualised the data during acquisition. The Simrad EA400 Single beam echo sounder was utilised as a quality check on the absolute values of the MBES data. This data was also interfaced to QPS QINSy, which recorded and visualised the data. The multibeam system performed as expected during acquisition, providing generally high-quality data collection throughout the survey area. Data was continually monitored during acquisition by the online surveyor to ensure project specific and Bibby HydroMaps data standards were achieved. The sound velocity profile of the water column was continually monitored during the survey, with profiles collected at least every 6 hours and as the water depth changes dictated. The profiles indicated minor variation during the survey, fluctuating between 1497 ms-1 and 1502ms-1. The recorded sound velocity information within the survey area indicates this variable had negligible influence in the total propagated uncertainty (TPU) of the multibeam soundings. An Edgetech 4200MP dual frequency digital high-resolution side scan sonar system was utilised for the SSS aspect of the works. The system comprises a digital tow fish and a transceiver processor unit (TPU) interfaced to a CODA DA4G geophysical data acquisition system running Coda GeoSurvey acquisition software. Coda GeoSurvey software records dual frequency raw data simultaneously, which is time-stamped, and combined with positional information from QPS QINSy navigation software, providing real time geo-referencing of the records. The sonar data is displayed in real-time and gains are applied to the raw data for preliminary interpretation of the seabed acoustic properties and for the investigation of any potential target present on the seabed or on the water column, along with the capability for target tagging and accurate measurement and image capture tools. Tow fish positioning was carried out using the USBL system onboard which calculated a range and bearing to a beacon installed on the tow cable (1m from the tow fish) relative to a known vessel offset. As a backup, the length of cable out was measured using a T-Count system. The side scan sonar data collected was, generally, of high quality. Over 125% coverage was achieved allowing targets to be identified on more than one survey line and the centres of each swath to be covered. Side scan sonar line spacing was 50, 40, and 25 metres, with an operating range of 75 metres being utilised. The fish was towed at an optimum height (for the range of 75 metres) of approximately 8 or 4 metres above the seabed. Occasional tugging was evident although this has not affected the quality of the final mosaic or the identification of any targets, features, or seabed character and all lines re-run if the data quality was sub-standard. Similarly, positional data was of high quality, enabling accurate location of any targets, and ensuring seabed features aligned on adjacent lines. ABP Marine Environmental Research Ltd 02380711840 enquiries@abpmer.co.uk pointOfContact EPSG Geodetic Parameter Registry 2022-12-12 revision WGS 84 / UTM zone 30N